How To Get Relief From Pain, Popping And Clicking Sound While Training For Martial Arts?

Hi my name is michael i am 43 years old i am currently trianing in Martail arts however when i do my kicks everything is ok but when i do a roundhouse kick there is always a popping or clicking sound in my hip area like my joint is out of socket on both sides. and I spoke to my instructor and he told me to strentch more i took yoga briefly ,and no relief there is know pain or anything on a daily base only when i do the round house kick do you have any advise please help i refuse to give up Martial Arts and I will be starting a yoga class again